投影

基本解释 (translations)

projecture  ·  projections

与投影相关的网络例句 [注：此内容来源于网络，仅供参考]

Back projection display apparatus includes an optical engine, and display screen of back projection.

一种背投影显示装置及其背投影显示屏幕，背投影显示装置包括一光学引擎与背投影显示屏幕，光学引擎所提供的影像光束透过背投影显示屏幕显示影像。

Whereas parallel projections are used to project points onto the image plane along parallel lines, the perspective projection projects points onto the image plane along lines that emanate from a single point, called the center of projection.

与平行投影沿着平行线将物体投影到图像平面上不同，透视投影按照从投影中心这一点发出的直线将物体投影到图像平面。

On the basis of the properties of central projection and orthographic projection, the differences of different rectification approaches based on orthographic projection are explained, and it is suggested that oblique-plane-rectified photograph can produce orthographic representation of flat terrain cover; differential rectification of RS imagery based on DEM can produce orthographic representation of waved terrain cover; and true orthographic rectification based on digital ground-object model can produce orthographic representation of single objects on ground.

根据中心投影和正射投影的特点，从理论上说明了不同正射投影纠正方法之间存在的差异，认为：基于透视变换的像片倾斜纠正可生成水平地表覆被的正射投影表达；基于DEM的正射影像微分纠正可生成起伏地表覆被的正射投影表达；基于数字地物模型的真正射纠正可生成独立地物的正射投影表达。

In this paper, a series of lunar map projection formulas are deduced including azimuthal projections, cylindrical projections and conical projections. The lunar map projections software is compiled. By caculating lunar map projection distortions, their projection distortion rules are found. Base on the lunar exploration mission, the lunar map projection scheme is given in this paper. The azimuthal conformal projection or the circumcenter perspective azimuthal projection is usually used in small areas, especially in two poles. When the whole map of the moon is needed, the azimuthal conformal projection or the circumcenter perspective azimuthal projection is used within 10° in the poles, and the traverse tangent cylindrical conformal projection or the normal secant conical conformal projection can be used in else areas, furthermore, band-division is necessary to reduce the projection distortion.

本文推导了基于月球参考球的各种投影公式，主要包括方位投影、圆柱投影和圆锥投影；编制了月球地图投影计算软件；对多种月球的投影变形进行了详细的计算，总结分析了各种月球投影的变形规律；结合月球探测的需要，给出了月球投影方案的建议：对于局部的面积较小的投影区域，建议使用等角方位投影或外心透视方位投影；如果绘制月面全图，在两极10°范围内采用等角方位投影或外心透视方位投影，其余区域可以采用等角横切圆柱投影和等角正割圆锥投影，并且要进行分带处理。

This paper established a new kind of relation on projection——conic projection analogue by introducing the latitude circle and longitude circle analogues, then discussed the best choice of the conic vertex angle in this projection, and found the mathematical model and the applicable scope of this projection.

摘 要：本文通过引入类纬圈和类经圈，建立了一种新的投影关系——类圆锥投影，进而探讨了类圆锥投影中圆锥顶角的最佳选择，找到了类圆锥投影的数学模型和适用范围。

According to their processes of construction, the projection methods are classified into three types in the present paper, namely, the Helmholtz-Hodge decomposition projection methods, the operator splitting projection methods and the local continuous projection methods.

本文根据投影方法的构造思路，将众多的投影方法分成了3类，即： Helmholtz-Hodge分解类投影方法、算子分裂类投影方法和局部连续投影方法，并详细的介绍了3类投影方法的发展历程和求解步骤。

The first section is descriptive geometry, including basic knowledge of cartography and projection, projections of point, beeline, plane and their interrelations, projection transformation, curve, curving plane, the projection of curving plane solids, line of section, line of intersection, section and segmentation, elevation projection, dimetric projection.

第一部分为画法几何：其中有制图基本知识，投影的基本知识，点、直线、平面的投影及它们之间的关系，投影变换，曲线、曲面及曲面立体的投影，截交线与相贯线，剖面图与断面图，标高投影，轴测投影等。

We expect it will benefit the industry field to break through the optical measuring limits at present by offering some new ideas. Optical measuring research based on moire interferometry has developed for several decades. The main idea of this research is to utilize the moire effect caused by two superimposed gratings of identical or similar spatial frequency. One is the reference grating and it is a virtual grating created by a computer program in this research; The other grating is the image of grating projected on the measured surface by the DLP projector, and this grating will distort because of the different sloped profile of the surface. To superimpose the program-created grating and the captured distorted grating will derive the so-called moire effect. This research combined the basic theory of optical interferometry and moire effect to project the different phases of the projected grating fringes by the phase-shifting method and compute the principal value of arguments between -π,π. In the end, the phase unwrapping program based on discrete Fourier transform of solving PDEs is used to unwrap the phase of the measured surface, and finally the surface profile is derived by the optical measuring system.

以叠纹干涉术为基础的光学检测研究之发展早已行之有年，而在本研究中所采用的投影叠纹法(Projection moiré)之主要精神在於藉由两道空间频率相近或相同的光栅相互叠加而成的效应，其中一道为参考光栅，而本研究中的参考光栅是以程式产生可调整不同空间频率的虚拟光栅；另一道则为投影至待测物表面的光栅影像，而在起伏高度不一的待测表面上的光栅影像会受到待测物表面起伏状况不同而在观测方向产生光栅投影条纹影像的歪曲变形，将电脑产生的参考光栅与由影像撷取装置所获取投影於待测物表面的光栅影像作叠合，便会产生所谓的叠纹效应；利用基本的光学干涉理论与叠纹效应结合，本研究中以相移法来改变投影於待测表面的光栅相位，再以相移法的理论反运算出在带有待测面各点高度资讯之介於-π，π相位主幅角，再以离散傅立叶转换解偏微分方程的相位重建程式还原待测面的相位值，以得知待测面之表面轮廓。

This paper studies and analyses the map projection transformation, using VC ++ programming language to realize three projection transformation: inclined position projection, Mercator projection and Gaussian M- Ke Lvge projection, and makes the application tests.

本文对地图投影变换做了尝试性的分析研究，利用VC++编程语言实现了斜轴等积方位投影、墨卡托投影和高斯-克吕格投影三种投影变换，并做了应用测试。

First sharp projector screen Hongye projection screen, projector screen snow, the United States, as the projection screen, projector screen, projector screen Lai Ping, three stone projection screen, projector screen trefoil, Samsung projection screen, Terai projector, projection screen to Connaught, Lai screen projection screen , Dino projection screen, cigna÷projection screen, projection screen Sen Pu, Fujitsu projection screen, Denmark DNP projection screen, Da-Lite projection screen, import projection screen, grid, network engineering, system integration, plane cabinets, screens, General wiring, projector rental, hanger campus network, monitoring network, broadcasting network, multimedia network classroom, karaoke OK, stage lighting, audio equipment, network products, video capture cards ......

先锐投影幕红叶投影幕、白雪投影幕、美视投影幕、投影机屏幕、丽屏投影幕、三石投影幕、三叶投影幕、三星投影幕、特莱投影机、地诺投影幕、丽屏投影幕、帝诺投影屏幕，cigna西格娜投影幕，森浦投影屏幕，富士通投影屏幕，丹麦DNP投影幕，Da-Lite投影屏幕，进口投影幕、网格、网络工程、系统集成、机柜、屏幕、综合布线、投影机出租、吊架校园网，监控网，广播网，多媒体网络教室，卡拉OK，舞台灯光，音响设备，网络产品、视频采集卡……销售地区：广东省广州市番禺区花都区增城市从化市江门市恩平市湛江市鹤山东莞市中山市河源市台山市潮州市茂名市深圳市城珠海市汕头市韶关市梅州市汕尾市佛山市阳江市湛江市肇庆市清远市云浮市城乡揭阳市海南省湖南省广西省

与投影相关的网络解释 [注：此内容来源于网络，仅供参考]

azimuthal projection：方位投影

110方位投影 (azimuthal projection) 以平面为承影面的投影. 假想用一个平面与地球相切或相割,将球面上的经纬网投影到平面上,能保持由投影中心到任意点的方位与实地一致的投影. 79 圆m) 用电子方法处理文字、图形、图像信息,并予以出版的综合系统.

conformal projection：等角投影

投影既然是一种数学变换方法,那么任何一种投影都存在一定的变形,因此可以按照变形性质将投影方法如下分类:等角投影(Conformal Projection)、 等积投影(Equal Area Projection)、等距投影(Equidistant Projection)、等方位投影(True-direction

conformal conic projection：正形圆锥投影;等角圆锥投影

conformal chart 正形投影海图 | conformal conic projection 正形圆锥投影;等角圆锥投影 | conformal cylindrical projection 正形圆柱投影;等角圆柱投影

equiareal projection：等积投影 正積投影

■ equiangle projection 等角投影 正角投影 | ■ equiareal projection 等积投影 正積投影 | ■ equidistant projection 等距投影 正距投影

equidistant projection：等距投影

投影既然是一种数学变换方法,那么任何一种投影都存在一定的变形,因此可以按照变形性质将投影方法如下分类:等角投影(Conformal Projection)、 等积投影(Equal Area Projection)、等距投影(Equidistant Projection)、等方位投影(True-direction Pr

equidistant projection：等距投影 正距投影

■ equiareal projection 等积投影 正積投影 | ■ equidistant projection 等距投影 正距投影 | ■ equilibrium river 平衡河流 平衡河川

gnomonic projection：球心投影(又称"日曼投影"、"大环投影

137多圆锥投影polyconic projection | 138球心投影(又称"日曼投影"、"大环投影")gnomonic projection | 139正射投影orthographic projection

projection; Gnomonic：諾蒙尼日投影;點切投影;日晷投影

projection chart 地圖投影法 | projection; Gnomonic 諾蒙尼日投影;點切投影;日晷投影 | projection; Lambert 藍白特投影

perspective projection：投影

投影可以分为两大类,即透视投影(Perspective Projection)和平行投影(Parallel Projection);如果投影中心到投影平面的距离是有限的,那么投影线是从投影中心发出的无数条射线,这种投影称为透视投影;如果投影中心到投影平面的距离越来越远,

transverse Mercator projection：横轴墨卡托投影

各局部区域的面积大小对比处于突出地位,常使用等面积投影;地形图则通用等角性质的投影,现在绝大多数国家使用横圆柱投影(包括高斯投影和通用横轴墨卡托投影( TRANSVERSE MERCATOR PROJECTION )),极少数也采用兰勃脱投影( LAMBERT PROJECTION )或其它投影;